阅读说明：本技术 一种罗茨风机叶轮的制作方法 (Manufacturing method of Roots blower impeller ) 是由 汪小忠 于 2018-09-04 设计创作，主要内容包括：本发明涉及一种罗茨风机叶轮的制作方法：在激光切割机下进行切割叶轮片,对切割好的叶轮片进行冲压,在叶轮片的三个叶子上冲压出两两叶轮间能够扣合的凸凹点；在叶轮连接杆上压装叶轮片,叶轮片和叶轮连接杆利用槽齿和定位齿进行固定,叶轮片和叶轮片之间使用凹凸点贴合；叶轮连接杆与叶轮片之间的缝隙利用电焊填补并使用螺母锁紧。本发明工序简单,使用激光切割,叶轮片精准光滑,设置凸凹点使叶轮片扣合紧密,使用螺母锁紧稳固可靠。(The invention relates to a manufacturing method of a Roots blower impeller, which comprises the following steps: cutting impeller blades under a laser cutting machine, punching the cut impeller blades, and punching convex-concave points which can be buckled between every two impellers on three leaves of the impeller blades; pressing impeller blades on an impeller connecting rod, fixing the impeller blades and the impeller connecting rod by using groove teeth and positioning teeth, and attaching the impeller blades and the impeller blades by using concave-convex points; the gap between the impeller connecting rod and the impeller blade is filled by electric welding and locked by a nut. The invention has simple process, uses laser cutting, has precise and smooth impeller blades, is tightly buckled by arranging the convex-concave points, and is firmly and reliably locked by using the nut.)

1. The manufacturing method of the Roots blower impeller is characterized by comprising the following steps:

(A) manufacturing cad drawings according to the detailed size of the outer contour of the trilobal impeller, and inputting the cad drawings into a laser cutting machine;

(B) selecting a cast iron plate with the thickness of 1.5mm, placing the cast iron plate under a laser cutting machine to cut impeller blades, and forming groove teeth in the centers of the impeller blades;

(C) the method comprises the following steps of selecting zinc-based alloy, casting an impeller connecting rod at 420 ℃ by using a mould, arranging positioning teeth on the outer ring of the impeller connecting rod, and using a conventional release agent in the field before and after casting;

(D) punching the cut impeller blades, and punching convex-concave points which can be buckled between every two impeller blades on three leaves of the impeller blades;

(E) pressing impeller blades on an impeller connecting rod, fixing the impeller blades and the impeller connecting rod by using groove teeth and positioning teeth, and attaching the impeller blades and the impeller blades by using concave-convex points;

(F) the gap between the impeller connecting rod and the impeller blade is filled by electric welding and locked by a nut.

2. The manufacturing method of the roots blower impeller according to claim 1, wherein: (D) and arranging one convex-concave point on each leaf.

Technical Field

The invention relates to the field of Roots blower manufacturing, in particular to a manufacturing method of a Roots blower impeller.

Background

The Roots blower is a positive displacement blower, the impeller is a rotating part of the Roots blower and is divided into two blades and three blades, but the Roots blower has gradually replaced the two-blade Roots blower due to the advantages of smaller air outlet pulsation, smaller noise, higher mechanical strength, smaller load change, more stable operation and the like compared with the two blades of the three blades.

Two three-blade impellers are arranged on two parallel shafts, a tiny gap is always kept between each impeller and the inner hole surface of the oval case, and the impellers rotate in opposite directions at a constant speed, so that a certain amount of gas surrounded by the case body and the impellers is conveyed from the sucked side to the discharged side.

At present, the three-blade impeller is generally made of cast iron materials, secondary processing is carried out after casting, precision equipment is needed for processing, the process is complicated, and the efficiency is not high.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a manufacturing method of a Roots blower impeller.

The technical scheme for realizing the purpose of the invention is as follows: a manufacturing method of a Roots blower impeller comprises the following steps:

(A) manufacturing cad drawings according to the detailed size of the outer contour of the trilobal impeller, and inputting the cad drawings into a laser cutting machine;

(B) selecting a cast iron plate with the thickness of 1.5mm, placing the cast iron plate under a laser cutting machine to cut impeller blades, and forming groove teeth in the centers of the impeller blades;

(C) the method comprises the following steps of selecting zinc-based alloy, casting an impeller connecting rod at 420 ℃ by using a mould, arranging positioning teeth on the outer ring of the impeller connecting rod, and using a conventional release agent in the field before and after casting;

(D) punching the cut impeller blades, and punching convex-concave points which can be buckled between every two impeller blades on three leaves of the impeller blades;

(E) pressing impeller blades on an impeller connecting rod, fixing the impeller blades and the impeller connecting rod by using groove teeth and positioning teeth, and attaching the impeller blades and the impeller blades by using concave-convex points;

(F) the gap between the impeller connecting rod and the impeller blade is filled by electric welding and locked by a nut.

The convex-concave points in the step of the technical scheme (D) are arranged on each leaf.

After the technical scheme is adopted, the invention has the following positive effects: the invention has simple process, uses laser cutting, has precise and smooth impeller blades, is tightly buckled by arranging the convex-concave points, and is firmly and reliably locked by using the nut.

Detailed Description

The present invention will be further described with reference to the following examples.

The manufacturing method comprises the following steps:

(A) manufacturing cad drawings according to the detailed size of the outer contour of the trilobal impeller, and inputting the cad drawings into a laser cutting machine;

(B) selecting a cast iron plate with the thickness of 1.5mm, placing the cast iron plate under a laser cutting machine to cut impeller blades, and forming groove teeth in the centers of the impeller blades;

(C) the method comprises the following steps of selecting zinc-based alloy, casting an impeller connecting rod at 420 ℃ by using a mould, arranging positioning teeth on the outer ring of the impeller connecting rod, and using a conventional release agent in the field before and after casting; the mold can be preheated to 220 ℃ before casting, and then a release agent is used;

(D) punching the cut impeller blades, and punching convex-concave points which can be buckled between every two impeller blades on three leaves of the impeller blades;

(E) pressing impeller blades on an impeller connecting rod, fixing the impeller blades and the impeller connecting rod by using groove teeth and positioning teeth, and attaching the impeller blades and the impeller blades by using concave-convex points;

(F) the gap between the impeller connecting rod and the impeller blade is filled by electric welding and locked by a nut.

(D) And arranging one convex-concave point on each leaf.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.